Quick answer: Open Signature & stamp, take a photo or select an image, crop around the mark, and adjust background removal. Tap Create transparent PNG to export the extracted ink.
Start with a clear source
Use a signature or stamp you are authorized to reproduce. Place the paper flat and photograph it from directly above in even light. Keep the whole mark in focus and avoid glare, folds and a strong phone shadow. A better source usually needs less correction.
Crop close enough to remove unrelated text and paper edges, while leaving a small margin around every stroke. The app cannot identify which of several nearby marks you intended to extract.
Extract the ink
- Open Signature & stamp. Choose Take photo or Select Image.
- Crop the source. Keep the complete signature or stamp inside the crop, then return to the editor.
- Choose an ink mode. All ink is a good starting point for colored or mixed marks. Red stamp isolates red ink; it is not the right filter for a blue stamp.
- Set Ink color. Choose Keep original colors to retain the detected colors, or black, red, blue or Custom color to recolor the result.
- Adjust the preview. Tune Background removal and Remove paper shadows. Use the ink-depth, edge-clarity and gap-repair controls where needed.
- Create and save the PNG. Inspect the Result screen and save the output. A white image viewer background does not necessarily mean the PNG has lost transparency.
Improve faint ink without joining letters
If faint strokes disappear, ease back on background removal first. Increasing ink depth can make retained pixels more solid. Edge clarity changes the edge transition; too much can erase thin details. Small-gap repair can connect short breaks where neighboring strokes provide evidence.
Inspect small characters and narrow spaces at each step. Strong repair settings may change delicate shapes. A large missing letter or an incomplete company name cannot be recovered reliably from pixels that are not there. Retake the photo or use a clearer original when important details are absent.
Use Smart enhance when you want automatic settings
Tap Smart enhance and complete the offered rewarded ad. The app automatically selects local processing settings. For that image in the current editing session, you can retry or undo without watching another ad. If processing fails after the reward, retry in the same session.
Smart enhance uses adaptive image-processing algorithms, not a bundled neural model. It does not authenticate a signature or certify an electronic seal. Manual controls remain available without a rewarded ad.
Use the result on a photo
Choose Use on an image from the result or open the Watermark tool to place a signature image on a photo. Keep the transparent PNG as your reusable source. Converting it to JPG replaces transparency with an opaque background.